Nozzle



sur l May 31, 1960 G. G. ALLENBAUGH 2,938,673

NOZZLE Filed May 2, 1958 2 Sheets-Sheet 1 32 35 54 K v g' /LI 2 45K [55 s 55; 4g

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FIG. 2 F/G. 3

INVENTOR.-

ATTORNEYS May 3l, 1960 G. G. ALLENBAUGH 2 Sheets-Sheet 2 Filed May 2, 1958 FIG. 4

INVENTOR. FIG 6 GEORGE G. ALLENBAUGH, JR.

BY Wy 5MM ATTORNEYS NOZZLE George G. Allenhaugh, Rittman, Ohio, assigner to Akron Brass Manufacturing Co., Inc., Wooster, Ohio, a corporation of Ohio Filed May 2, 1958, Ser. No. 732,675

Claims. (Cl. 239-458) This invention relates to nozzles, and more particularly, iire lighting nozzles of the type which are adjustable to selectively provide either a straight stream or a tine dispersion, generally termed as fog with separately selective gallonage control.

There are a number of reasons why different gallonages of nozzle output are desired. For example, the supply or` water available for lighting one tire may be materially diiierent than the supply available for lighting another `tire. Volunteer'lire departments are often called upon to tight rires with a supply of Water essentially obtained from ytank trucks, or the like. At other times, they may ce called upon to iight hres where ample supplies of water under good pressure are available. When there is limited supply or water available, it is desirable to conserve that water supply. On the other hand, when there is an ample supply of water available, the water can be used freely. Further, the amount of water needed is dependent on the size of the tire and the stage of the tire. With a small lire it is desirable to limit the amount of water used to avoid excessive water damage.

Prior practice has often been for tire fighting organizations to maintain both a set of large lire iighting nozzles and a set of small nozzles. This has been done to vprovide the desired exibility in lire lighting apparatus which permits a lire fighting organization to use either low or high quantities of water.

This invention provides one nozzle which permits an operator to quickly and accurately select the appropriate one of a plurality of gallonages for the circumstances presented to him. The nozzle is constructed to permit the operator to shut the nozzle ot, change gallonages, and

limmediately turn the nozzle back on to meet varying needs in fighting a fire without undue delay such as might be experienced in changing from one nozzle to another. At the same time, the nozzle is so constructed that once it is in operation, it is a constant gallonage nozzle and the operator cannot accidentally or intentionally vary the gallonage of the nozzle without rst turning the nozzle o. The gallonage selection provided is completely independent of any adjustment of stream contour or character. Conversely, the stream contour adjustment cannot eiiect the gallonage adjustment.

Constant gallonage is desirable in a nozzle equipped with a foam producing apparatus. In modern lire iighting technique an apparatus known as an eductor or a proportioner is often connected into and forms a part of the fluid supply line to the nozzle. These eductors are Venturi type apparatuses' which draw detergents or other foam producing substances into the fue lighting fluid. The foam increases the lire smothering eiciency of an emitted stream. The ecient operation of a Venturi is dependent on relatively critical and constant ow of uid through it. Therefore, the use of a variable gallonage nozzle in combination with an eductor results in ineicient operation of the eductor.

Another reason for constant gallonage is that adjustments in the nozzle which vary the gallonage flow, will Patented May 31, i960 ice throw a damaging strain on a supply pump. I The'danger of such strain creates a necessity for constant surveillance of the pump. The nozzle of the present invention reduces the need for surveillance because the gallonage will not be altered without torewarning by a'V nozzle operator.

Another reason for the necessity of constant gallonage, is that when two or more lire iighting nozzles are` supplied by a common source of uid under pressure, an adjustment of one nozzle which causes a variation in ythe gal lonage will elect the other nozzles. If the pers-ons operating the other nozzles are not forewarned of such changes, injury can result. Further, variation in the gallonage is certain to change the ethciency of any eductor and alter the quantity of introduced foaming agents.

Accordingly, one of the principal objects of this inven tion is to provide a novel and improved vnozzle which may be operated in one of a plurality of preselected constant gallonage adjustment positions.

Another object of `the invention is to provide a nozzle which can be quickly and accurately adjusted to a desired preiudexed gallonage without etecting the stream contour adjustments.

A further object of the invention is to provide a nozzle which permits the operator to select a desired gallonage, but prevents the operator from accidentally or intentionally altering the gallonage of the nozzle once the nozzle is placed in operation.

Conversely, another object of the invention is to pro vide an adjustable constant gallonage nozzle which must be shut off completely prior to alteration of the gallonage to thereby prevent such alteration without notice to others using the same source of water supply.

Yet another object of the invention is to provide a nozzle having a nadie which is selectively movable axially to either of two preselected positions to provide a dual gallonage nozzle.

Another of the principal objects of this invention is to provide a constant gallonage nozzle which is also selectively adjustable to provide either `fog or straight stream emission.

Yet another object of the invention is to provide a novel and improved nozzle which has a plurality of selectable, predetermined gallonages', but which nonetheless when placed in operation is a constant gallonage nozzle having stream contour adjustment. l

Heretofore it has been diflicult to manufacture nozzles having stream adjustment provided byrelative rotation of a base and a sleeve for axial shifting of the sleeve and base. Prior to this invention, it has been customary to assemble a nozzle, place it on a Itest rack, and operate Vit in a straight stream position. Only by such elaborate procedure could stream locating markers be placed on the nozzle parts.

Accordingly, another object of this invention is to provide a novel and improved lire fighting nozzle which can be made and completely assembled Without the necessity of placing it on a test rack to locate stream position indicia.

Another and related object of the invention is to provide a nozzle having a body member and a sleeve member which is relatively movable to obtain stream adjustment in which relative rotation of the members causes such adjustment and in which the amount of rotation from each adjustment position to each contiguous adjustment position is uniform.

Other objects and a fuller understanding of the invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawings, in which:

Figure l is a sectional view along the axis of the novel and improved fire fighting nozzle of the present invention; Y Y

Figure 2 is a fragmentary sectional view of the device of Figure 1 as seenl from the plane of cross section' with therelatively adjustable partsV shifted to a-fog emission positiong* Y r Figure. 3 is a fragmentary sectional view of the nozzle of Figure 1 -as seen from the yplane of cross section with thebafe shiftedto a second constant gallonage .position; f Y

. Figure 4 is a top plan v-iew of the base member of the nozzle; Y Y r Figure'S isV aside elevational view of the device of Figure .4; andY VFigure 6 is an exploded view partly in cross-section of the novel spider employed in this invention and the throat collar member. r

In the drawings and in =Figure 1 in particular, a nozzle N is disclosed which includes a fluid conduit in the form of a body 10. The body has a. through uid passage 24. At a first or inlet end 11 the body 10 is threaded to receive an annular adapterv 12. The adapter 12 is a body extension which carries an annular swivel 13. The swivelr13 has internal threads 14ffor connecting the nozzle to a male fire hose connector. A plurality of balls 15 are provided to facilitate relative rotation of the swivel 13 about the adapter 12. A gasket 16 is also provided. The gasket 16 serves to form a fluid type connection between a fire hose male coupling element and the adapter 12.

Ihe reference character 19 identifies a ball-type shut olf valve which is carried by the body 10. adjacent the inlet 11. 'I'he shut off valve has a handler20 which is connected to `a trunnion 21. A ball 22 is rotated approximately 90 by movement of theY handle 20 and the connected trunnion 21. In Figure 1 the valve is shown in a shut oposition with a ball passage 23 disposed with its axis normal to the axis ofthe nozzle.Y The ball 22 may be rotated 90 toalign the passage 23 with the body passage 24 and thereby permit uid tovpass through the nozzle.

Adjacent an outlet or'delivery end 27 of the base 10 the nozzle is formed to control both the volume and thecontour of an emitted stream of uid. Part of this stream control is provided by an annular throat collar 28 which is rigidly secured to the body 10 at the outlet end 27. The throat collar 28 is an extension of the body 4 locating the sleeve in positions intermediate the extremes of Figures l and 2.

A plurality of depressions 38 are formed in base 34 of the cam groove 35. A ball type detent 39 is carried in the cam `groove follower 36.Y The detent 39'is urgedby a spring 40 into engagement with. the baseVV of the cam groove 35. The spring 40Lurg`es the ball detent 39 into each of the depressions 3ft-when there is alignment between the `detent and a depression.Y As will subsequently be described in V'more detail,lthis action locates the various desired streams for the operator.

In the illustrated embodiment, a cuff 41, Aformed of- Y rubber, is provided.` 'Ihe cuif41 is Aperipherally carried by the sleeve 31.

or Vconduit 10 and ris therefore apart of the conduit or body. The connection may be formed by threads 29 with a suitable gasket 30 being provided to insure fluid tight integrity between the body 10 and the collar 28.

A'tubular sleeve 31 is carried by the body 10. The sleeve 31 lhas a smooth cylindrically contoured inner surface 32 which is in sliding engagement with both the peripheral surface of the Vbody 10 and the peripheral surface of the throat collar extension of the body 28.

The body and the sleeve 31 arerelatively'movable both axially and rotatively.

A cam groove 35 is Iformed in the peripheral surface of the body `10. A cam groove Ifollower 36 is threaded Y When the sleeve 31 or stream choke means is inthe advanced position4 of Figure l the emitted stream is 'choked into a straight stream. When thev sleeve 31 is in the retracted position of Figure 2 a wide angle fog is emitted.Y VIntermediate adjustments are obtainable by into an aperture 37 in the sleeve 31. The cam groove 7 prevents. relative radial movement.

The cu 41 is formed to facilitate gripping by the hand of an operator and thereby facilitate relative rotation of the sleeve and base.

One of the advantages of the invention is that the depressions YV38 are uniformly spaced Acircumferentially speaking. This uniform spacing permits uniform adjustment rotation from one adjustment position to a contiguous adjustment and minimizes the danger of over adjustment.

Varying ydegrees of relative axial movement between the sleeve 31 and the body 10 are required when shifting the nozzle Afrom one desired stream adjustment position to another. Thus, to move the sleeve from fog position to V30" fog position, for example, requires less relative axial movement thenY to shift from either of the fog positions to straight stream. Even though this is true, the novel arrangement of the present invention permits the operator to use the same amount of rotation for adjustment from any stream position to a contiguous stream position. Figures 4 and 5 show that the pitch of the cam groove 35 varies in the vsegments of the groove between each adjacent pair of depressions to achieve this desired uniform rotation characteristic. Y

Previous proposals have provided threaded interconnection between a sleeve and body to cause relative axial movement upon relative rotation of the two. With such a construction it was necessary to put a nozzle on a test rack andadjust it while in operation to a straight stream position. Thereafter appropriate indicia were put on the nozzle parts to indicate the location of each stream. The cam and follower construction of the present invention permits a nozzle to be made and assembled without operating the nozzle tovlOcrate the various streams.

A spider 44 iscarriedin the body 10. 'The spider 44 has a plurality of legs 45. Preferably there are three legs 45 whichare in sliding abutment with inner surface 46 of the body 10. rl'ihe sliding abutment permits relative axialn'androtational `movement, but substantially A bathe 43 having a stem 47' and ahead 48 is also provided. The baffle I stem 47 projects through an axial aperture in the spider 44 and is xed tothe spider by a nut 49. The nut 49 is threaded onto an Vend of the baffle stem 47. YCoacting flats 50 are provided on the baffle stem 47 and the spider 44 to prevent relative rotation of the spider and stem.

The throat collar 28 has an inner surface 53 which defines the outlet end of the through fluid passage in the nozzle. The throat collar 28 `has a flaring annular surface 52 which defines a segment of a cone. 'llhe throat surface 52 ares radially outwardly from the throat inner passage surface 53.

,The baie head 43 yis a water diverting head. It is a circular body which is concentric with the conical sur- Y face 52 and the inner surfacer53 of the throat collar 28.

yIt willfbe'seen that the bafe head 48 is of greater diameter Ythan the throat through-passage surface 53.

Another of the outstanding advantages ofthe invention is provided by the coaction of the bale head 4S and the conical surface 52. The baffle head 48 and the l' conical surface `52 together define anannular orifice 54 which is a flow or gallonage control constriction. l This a flow control constriction assures constant gallonage. The throat control constriction 54 is designed to provide the smallest cross-sectional area across the lluid path through the nozzle in whatever `adjustment position the nozzle is placed. Forward shifting of the sleeve 31 to the position of Figure l permits the sleeve to bend an emitted stream into a straight stream. As examination of Figure 1 will reveal, the cross-sectional area of the space between the sleeve and the baffle head is preferably substantially greater than the cross-sectional area of the oritice 54. The gallonage of this nozzle under all operating conditions is constant.

Retraction ofthe sleeve to the position shown in Figure 2 permits an emitted stream to be a so-called 120 fog stream. Any desired number of stream contours between these two extremes can be obtained by selective positioning of the sleeve and by formation of an appropriate number of depressions 38. Even though the nozzle is so adinstable, the volume of water flowing through the nozzle is constant because the constriction 54 controls the volume. Thus, the disclosed nozzle is a constant gallonage nozzle even though it is selectively either a fog or a straight stream nozzle.

The outstanding advantage of this invention is that while the nozzle is constant gallonage when in operation, the operator may nonetheless select the desired gallonage before turning the nozzle on. The operator may also quickly and accurately change gallonages to meet varying conditions as a lire is being fought. Thus, once most of a lire has been put out the operator may conclude the llre lighting operation without undue water damage and without changing nozzles to avoid such damage. This advantage is achieved by providing a baille which is axially shiftable to one of a plurality of preselected positions. In the preferred and disclosed embodiment there are two such positions.

The throat collar has a radial inner end surface 56 which lies essentially normal to the axis of the nozzle. The throat collar 28 has a plurality of slots 55 formed in the inner end 56. There is one slot 55 for each spider leg 45, and both the spider legs and slots are preferably uniformly spaced angularly. With the preferred number of three legs 45 and slots 55, each leg and each slot is located 120 from the other two legs and slots respectively.

A spring 58 is interposed between a body shoulder S9 and the spider 44. The spring 58 urges the spider 44 forward against the throat collar 28. In Figure l the legs 45, of the spider 44, are disposed in the slots 55 of the throat collar 28. This is a maximum gallonage position with the baille head 48 a maximum distance from the surface 52. If an operator wishes to change to a minimum gallonage, he must first shift the ball shut off valve to the position of Figure l to stop the ilow of water. vHe then simply presses the baille head 48 inwardly or rearwardly and rotates it. This action shifts the baille head 48 and the connected spider 44 in against the action of spring 58. The rotation takes the legs 45 and the slots 55 out of alignment. When the operator releases the inward pressure, the spring 58 urges the spider 44 forward so that the legs 45 contact the end surface 56 in the position shown in Figure 3. This is the minimum gallonage position of the disclosed and preferred nozzle.

The reverse adjustment from minimum to maximum gallonage is achieved when the operator simply rotates the baille head 48 until the legs become aligned to the slots 55. The legs 45 will then snap into the slots 55 under the urging of the springs 5S. This is the position of Figure 1.

It will be seen that the construction so described prevents an operator from accidentally changing the gallonage of his nozzle. If he intends to change the gallonage, he will remember to warn other lre fighters who may be operating connected nozzles or pumps of the action he is about to take. Further, the operator of this nozzle automatically gets the maximum performance out of a 6 connected-eductor. It is not necessary for him to adjust the nozzle until the appropriate gallonage is provided. Further, the operator cannot unknowingly and accidentally alter the gallonage of his nozzle and thereby unknowingly reduce the efficiency of a connected eductor.

While the invention has been described with a great deal of clarity and detail, it is believed that it essentially comprises a constant gallonage nozzle which may be used in any of a plurality of selectively obtainable lluid emission patterns. A device has also been described in which adjustment from one stream to another is obtainable with a uniform amount of relative rotation and which can be manufactured and assembled without rack testing before the nozzle is completed. A nozzle has also been described which while constant gallonage also has the advantage of permitting an operator to preselect that gallonage.

Although the invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and the scope of the invention as hereinafter claimed.

I claim:

l. A nozzle for use with a lire hose, said nozzle having a through water conduit, said nozzle having an outlet at one end, baille means having a head and a support portion in said conduit, said baftle means head being spaced from said outlet end and being of a diameter greater than that of said conduit adjacent said outlet end, resilient means interconnecting said conduit and said baille means and urging the latter away from said conduit outlet, and said nozzle having longitudinally spaced stop means between said conduit and said baille means which may be selectively engaged to determine the spacing between said baille and the outlet of said conduit.

2. The device of claim 1 wherein said stop means are between said conduit and said baille support means.

3. In a fire lighting nozzle having a body defining a through iluid passage and means to adjust the contour of a fluid stream emitted from the passage at its outlet end, the improvement which comprises, a baille carried in said passage and having an elongated stem and an enlarged circular water diverting head spaced from said outlet end, said baille having a greater diameter than the diameter of said passage adjacent said outlet end, said baille being longitudinally movable relative to said body, spider means maintaining said baflle and passage in coaxial relationship, said baille having a plurality of longitudinally spaced lluid rate of llow control positions, said nozzle including a plurality of longitudinally spaced stop means, said baille being operably connectable to said stop means one at a time to locate each of said positions, and resilient means urging said bafe into a selected operative connection to hold the bame in a selected position.

4. The device of claim 3 wherein the resilient means is a spring which urges the baille head away from said outlet stream control surface.

5. In a tire fighting nozzle the improvement which comprises, a conduit member having a through fluid passage and a discharge end, said conduit having a flared discharge end stream contour surface, a baille member having an elongated stem and an enlarged head of a diameter greater than the inside diameter of said discharge end surface, spider means in said conduit and holding said conduit and baffle in coaxial relationship, said baille and conduit being relatively movable longitudinally to a plurality of longitudinally spaced preselected gallonage control positions, said baille head and said surface being spaced at a preselected distance and dening a constricting throat therebetween when said members are in each of said positions, indexing stop and holding means operably connecting said members to index the members into said preselected positions one at a time, and a stream contour control sleeve 7 telescoped around Asaid members and axially movable relative to .said members, said sleeve havinga greater Water carrying capacity atV all times than the constricting throat defined by the members in each of said pre-selected positiOnS. 'j l. Q 6. Asuid ldispersing'nozzl'e comprising, a uid conduit member having a through uid passage and a delivery endlopening, a baiie member located in said end opening, said .baffiememberbeing located in spaced relation- -shipjto said 'uidconduitjmemben said baffle member including an'enl'arged head having aV diameter greater thanV the conduit passage adjacent the delivery end, said bae and conduit members jointly defining an annular oriiice, said baiie and4 conduit members being formed to 4impart a maximum fog spray character to a uid streamemitted through said orilice, means interposed between'the bathe .member and the Yconduit member and rigidly interconnectable with both of the members when the device is in operation to prevent Vrelative rotative adjustment movement and relative longitudinal movement of the .members to maintain the watercarrying capacity of saidy orice at a constant value, and stream choke means .selectively positionable around said orifice and said bale member head, said'choke means having a greater water carrying capacity than said orice under all operating conditions, whereby the emitted liuid may beA gathered into any desired degree of reconstituted stream." g,

7.V An adjustable constant gallonage're iighting nozzle comprising an elongated tubular body having a through iluidV passage and first and second open ends, the iirst end beingconnectable to. a fire hose coupling element or the like,.the body having au` outwardly flared annular flow control surfaceadjacent said second end, said surface defining a segment of a cone, a spider carried by said base and disposed insaid passage, a baille having an elongated stem and an enlarged circular water'diverting head, the bathe stem being connected to said spider, said spider and baie each lbeing held in a preselected axial position, the baie head being of greater diameter than the inside diameter of said base surface and being spaced from the base surface to coact with the base surface to control the-flow-of iluid through said nozzle, and an axially shiftable tubular open ended Vsleeve having a smooth `cylindrically contouredvinner surface, the sleeve being telescoped over said body and the sleeve inner surface' beingV inslidab-ie vengagement with the body, the sleeve and body being relatively axially shiftable to rst and second extremepositions, the first extremerposition being an advanced Vstraight stream position, the `second extreme position being a retracted fog position, the bale Vand the body conical surface being spaced to provide aconstrictingrthroat ,toV control the flow of tiuid through said nozzle, means interposed between the baffle and the body and rigidly interconnectable with both of the baie and the body when the Vdevicej is in operation toV preventjrelative rotative adjustment movement and relative longitudinal movement of the baiiie and the body, the sleeveV when in the straight stream Vposition being disposed about the batle head in spaced relationship therewith,V thev cross-sectional area of the space between the baflie head and inner surface being greater than the crosssectional area of said constricting throat;

- ,8, ln an adjustable firefighting nozzle, a tubular body having a through iluid conducting passage terminating at Yan outlet end, the body being a rigid member of pretudinal' movement of the members when the nozzle is in oper-,ation to deiineA a dow control annular throat, a sleeve slideably connected to the body for-relative axial movement, said sleeve being shiftable from an advanced to a retractedA stream control position, and said` sleeve having a greater water carryingcapacity at all times than said throat. j Y r 9. The device of claim l wherein a stream choke means is positioned around said conduit and longitudinally rmovable relative to said conduit to deilect an emitted stream of water and thereby selectively vary the character of the emitted stream, said choke means having a greater water carrying capacity inall positions than the space between the bafe and the outlet of said conduit.

10.7Thre device of claim 6 wherein the meansinterposed between the baie and the body members includes at least one notch formed in one of the members and at least one projection formed on the other of the members and disposed within the notch when the device is in operation.

l1. The device of claim 6-wherein baiiie member and conduit member are relatively movable longitudinally to a selected one of a plurality of gallonage positions when the device is not in operation and wherein the means interposed between the baffle member and the conduit member includes means to index said member into the selected one of said positions and maintain themembers in suchselected position when the device is in'operation.

12. The device of claim 6 wherein the conduit members and the stream choke means are tubular elements telescoped together and wherein one of the elements has an adjustment cam groove in a surface thereof and disposed transversely to the laxis of the nozzle, and wherein aoam follower is carried by theV other element and projects into the groove, and wherein the groove has a smooth guiding side wall abuttable with the follower tocause relative axial movement of the elements upon Yrelative rotation thereof.

13. The deviceof claim l2r wherein the guiding side `wall has a plurality of segments each offdilerent pitch than the remaining segments. Y

14. The device of claim 12 wherein the groove has a base with a plurality of spaced depressions therein and wherein said follower includes spring actuatedV detent means selectively engageable one at a time with an aligned one of said depression.

15. In -a fire fighting nozzle having a body having a through open ended uid conduction passage and a'sleeve carried thereby in axially shiftable relationship for vadjusting the contour of an emitted stream, the improvement comprising, an annular throat collar fixed to the body adjacent the outlet end of the body through passage, the throat collar havingl inner and outer ends, the

determined and ixed length, a spider positioned inthe relative rotative adjustment movement and relative longicollar inner end having a Vplurality Yof axially extending slots openingtowards 'the inlet end ofY said body, a spider carried 1n said body and having aV plurality of legs extendingfradially outwardly past the extremities of the throat fluid passage, a bathe having an elongated stem extending through the throat passage and connected to the spider, the batile also having an enlarged circular head concentric with the throat passage, said bathe being of greater diameter than the throat passage, the baie and spider being axially and rotatively movablerelative to said body and throat, the spider legs being disposable 1n said slots kin a Vfirst adjustment position, the spider legs beingengageable with said throat collar inner end to provide a second adjustment position, the bafe head and throat collar outer'enddeiining a constricting ow control passage, and resilient means carried by the body and urging said spider legs into abutment with the'throat collar. V

16. In a re fighting nozzle having a body having a through open ended uid conduction passage and a sleeve carried thereby in axially shiftable relationship for adjust- Si' ing the conteur of an emitted stream, the improvement comprising, an axially movable spider carried in the body through passage, the body having first and second longitudinally spaced adjustment stop means, the spider being selectively positionable to a first adjustment position to engage the first stop means and to a second adjustment position to engage the second stop means, resilient means urging the spider against said stop means, and a bafile having an enlarged head coactable with one of said body ends to provide a fluid flow control construction, said baffle having a diameter greater than said body passage, the cross sectional area of said constriction being of greater diameter than the inside diameter of said base surface and being adjustable to first and second preselected sizes by the selective positioning of said spider.

17. An adjustable constant gallonage fire fighting noz` zle comprising an elongated tubular body having a through fluid passage and first and second open ends, the first end being connectable to a fire hose coupling element or the like, the body having an outwardly flared annular flow control surface formed adjacent said second end, said surface defining a segment of a cone, a spider carried by said base and disposed in said passage, a baffle having an elongated stem and an enlarged circular water diverting head, the baffle stem being connected to said spider, said spider and bafe being held in a preselected axial position, the baffle head being of greater diameter than the inside diameter of said base surface and being coactable with the base surface to control the flow of fluid through said nozzle, and an axially shiftable tubular open ended sleeve having a smooth cylindrically contoured inner surface, the sleeve being telescoped over said body and the sleeve inner surface being in sliding engagement with the body, the sleeve and body being relatively axially shiftable to first and second extreme positions, the first extreme position being an advanced straight stream position, the second extreme position being a retracted fog position, the body having an adjustment cam groove in the periphery thereof, a cam groove follower carried by the sleeve and disposed at least in part within said groove, the follower and groove being coactable to cause relative axial movement of the sleeve and body from the first to the second extreme position upon relative rotation, the baffle and the body conical surface being spaced to provide a constricting throat to control the flow of fiuid through said nozzle, the sleeve when in the straight stream position being disposed about the baffle head in spaced relationship therewith, the cross sectional area of the space between the bale head and sleeve inner surface being greater than the cross sectional area of said constricting throat.

18. A constant gallonage fire fighting nozzle comprising, an elongated tubular body member having a through fluid passage and first and second open ends, an annular adapter fixed to the body first end, an annular swivel rotatably connected to the adapter, the swivel having internal threads for connection to a male fire hose connecting element, a ball type shut off valve carried by the body adjacent said body first end, an annular throat collar fixed to the body second end, a spider carried by said body and having a plurality of legs in said through passage, the spider being rotatably and axially movable relative to said body and substantially held against radial movement, the spider being disposed between the throat collar and the shut off valve, the throat collar having a smooth inner end surface located in a radial plane, the collar having a plurality of slots extending longitudinally from said collar inner surface, the spider legs being selectively receivable in said slots to provide one flow control position, the spider legs being shiftable out of said slots and positionable against the collar inner end surface to provide a second adjustment position, said body having an inwardly projecting annular shoulder adjacent said shut off valve, a spring interposed between said spider and said shoulder and urging said spider into said adjustment positions, a bafile having an elongated stem, the stem having first and second ends, the'stem rst end being connected to said spider, the throat collar having an outer end flow control surface, the baffle having an enlarged circular head fixed to the stem second end, said head having a greater diameter than the inside diameter of said throat collar, the baffle head and said throat collar flow control surface together defining an annular gallonage control constriction, a tubular sleeve having a ,cylindrically contoured inner surface in sliding engagement with the periphery of said body and said throat collar, a cam groove in the periphery of said body, and a cam follower carried by said sleeve and projecting into said groove, said cam follower and groove coacting to cause relative axial movement of the body and the sleeve on relative rotation of the sleeve and body whereby to adjust the contour of an emitted stream of fluid.

i9. ln a fire fighting nozzle having a body defining a through water conducting passage, an annular outlet stream control surface and means to adjust the contour of an emitted stream the improvement which comprises, a spider disposed in the passage, a baille having an enlarged circular head in spaced relationship with said stream control surface, said bafile having a diameter greater than said stream control surface adjacent said outlet end, said baille also having an elongated stem extending longitudinally from one side of the head, the bafe being carried by the spider and longitudinally disposed in said passage, the baffle being longitudinally and rotatively shiftable relative to said body, said nozzle including a plurality of longitudinally spaced groups of stops, said bafiie being selectively operably connectable to each group of stops one at a time to provide selective spacing adjustment positions between said head and said surface, a spring carried by said body and in operative connection with said baflie, said spring urging said baffle into operative connection with the selected group of stops, said spaced bafe head and surface together defining a flow control constricting throat therebetween limiting the rate of fluid ow through the nozzle, the rate of flow being a different preselected rate for each such adjustment position.

20. A fire fighting nozzle comprising an elongated tubular body member having an open ended through fluid passage, the first end being connectable to a re hose coupling element or the like, the body having an outwardly flared annular flow control surface formed adjacent said second end, a spider carried by Said base and disposed in said passage, a baffle carried by the spider and having an elongated stem and an enlarged circular water diverting head, said baille being held in a preselected axial position, and an axially shiftable tubular open ended sleeve member having an inner surface, the body having an outer surface, the sleeve being telescoped over said body and the sleeve inner surface being in sliding engagement with the body outer surfaces, the sleeve and body being relatively axially shiftable to first and second extreme positions, the first extreme position being an advanced straight stream position, the second extreme position being a retracted fog position, the sliding surface of one of the members including an adjustment cam groove, a cam groove follower carried by the other of the members and disposed at least in part Within said groove, the follower and groove being coactable to cause relative axial movement of the sleeve and body from the first to the second extreme position upon relative rotation thereof, said bafiie head and the body conical surface being spaced to provide a constricting throat to control the flow of fluid through said nozzle, the sleeve when in the straight stream position being disposed about the baille head in spaced relationship therewith, the crosssectional area of the space between the baffle head and sleeve inner surface being greater than the cross-sectional area of said constricting throat, said body including a plurality of longitudinally spaced sets of stops, said baffle being selectively operably connectable with said sets VYof stops one set at a time to provide pre-selection of thrOatarea, and resilient means carried by said body and in operable connection with said bae to urge said bae 2,552,445 t Nielsen May 3, 1951 into operative connection with a selected group of stops 2,565,457 Spender" f Aug, 21,1951 whereby to provide a device in which a constricting rate 5 2,717,777- l Steien- Y Sept. "1,3, 1955 of flow control throat is provided and in which the bae 2,747,939 .A Caird .----a May 29, may be placed in one of a plurality of selectable positions 2,797,134 Fuller V June V25, to provide a desired cross-sectional area in the constrict- Russell Dec-1' 17,

ing throat.

12 References Cited in the Vrile ofthis patent UNITED STATES PATENTS Schneider --.Y June 17,

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